Sentence 3.1.9.5.(6)

Intent 1:

To exempt certain combustible piping from the requirements of Sentence 3.1.9.2.(1) if certain conditions are met, on the basis that the imposed conditions limit the probability of the spread of fire or smoke.

Intent 2:

To expand the application of Sentence 3.1.9.5.(4) to combustible piping for central vacuum systems penetrating fire separations.